Ig Caption

IG Caption: Optimized Instagram Captions

Writes complete, paste-ready Instagram captions. Every caption follows a proven structure optimized for saves and DM-sends (the two highest-value algorithm signals in 2026). Captions sound like the creator wrote them. Never robotic, never filler.

Load account context (niche, audience, voice, language) from references/account-baseline.md. If not configured, ask the user about their niche, audience, and voice.

Key references:

• references/content-rules.md — Caption structure, CTA hierarchy, hashtag strategy
• references/scoring-system.md — Caption & CTA sub-criteria (20pts max)
• references/account-baseline.md — Proven caption patterns from top-performing posts

Workflow

Phase 1: Context

Gather the inputs needed to write a targeted caption.

1. Identify post type — Reel, Carousel, Feed image, or Story highlight
2. Identify topic — The specific content theme (e.g., "16:8 Fehler", "Proteinmythen", "Krafttraining ab 40")
3. Identify visual hook — The text overlay or visual hook used on the post itself (needed to create a thematically linked but different caption opener)
4. If any of these are missing, ask the user once. Do not proceed without all three.

Phase 2: Caption Structure

Load references/content-rules.md and apply the proven caption structure.

1. Read content-rules.md for current caption structure rules, CTA hierarchy, and hashtag strategy
2. Read account-baseline.md to identify which caption patterns performed best on recent top posts
3. Map the structure for this specific post:

• Hook variation opener (thematically linked to visual hook, never identical)
• Value body (problem statement, insight, or actionable tip)
• Line break separator
• CTA (selected from hierarchy based on post type and goal)
• Hashtag set (3-5 niche-specific)

Phase 3: Writing

Write the complete caption in German following these rules.

3a. Hook Variation Opener

The first line is the most important. It determines whether the user taps "more."

• MUST be thematically linked to the visual hook on the post
• MUST NOT repeat the visual hook text verbatim
• Opens a curiosity gap, challenges a belief, or makes a bold claim
• Keep it to 1-2 sentences max
• No filler openings ("Hey ihr Lieben" is for Stories, not Reel/Feed captions)

3b. Value Body (300-400 characters)

The core of the caption. Choose ONE of these structures based on the topic:

| Structure | When to use | |-----------|------------| | Problem-Solution | Topic addresses a common mistake or frustration | | Myth-Truth | Topic debunks a widespread belief | | Insight-Action | Topic shares a lesser-known fact with a practical takeaway | | Story-Lesson | Topic benefits from a personal anecdote or client story |

Rules:

• 300-400 characters of substance (not padding)
• Short sentences. Vary length (8-word punchy, 20-word explanatory)
• Write in the creator's voice (per account-baseline.md). No lecture tone.
• Use "du" (never "Sie", never "ihr" in captions)
• GROSSBUCHSTABEN for emphasis on single words (NICHT, OHNE, JETZT), not full sentences
• No em dashes. Use comma, period, colon, or sentence restructuring instead.

3c. Line Break

Insert a clear visual break (empty line) between the value body and the CTA section.

3d. CTA (Call to Action)

Select the CTA based on this hierarchy. Optimize for the highest-priority action that fits the post:

| Priority | CTA Type | Template | When to use | |----------|----------|----------|-------------| | 1 | Save | "Speicher dir das fur spater" | Default for educational/tip content | | 2 | DM-Send | "Schick das einer Freundin, die das braucht" | Relatable/emotional content | | 3 | Comment | "Schreib mir [keyword] in die Kommentare" | Interactive/opinion content | | 4 | Follow | "Folg mir fur mehr [topic]" | Only when demonstrating ongoing value |

Rules:

• Primary CTA first (save or DM-send for most posts)
• Secondary CTA optional (combine save + DM-send if both fit naturally)
• Never stack more than 2 CTAs
• CTA must feel like a natural closing, not a demand

3e. Hashtags (3-5 niche-specific)

• Place after the CTA with one empty line above
• 3-5 hashtags maximum
• NEVER use generic hashtags: #fitness, #motivation, #workout, #healthy, #fitnessmotivation, #healthylifestyle
• Use niche-specific hashtags relevant to the DACH fitness/IF audience

Good examples: #intervallfasten168 #krafttrainingfrauen #abnehmenab40 #proteinrezepte #wechseljahrefitness Bad examples: #fitness #motivation #gym #healthyfood #fitfam

3f. Length Check

• Total caption: 500+ characters minimum (including hashtags)
• If under 500 characters, expand the value body with additional detail or a second insight. Never pad with filler.

Phase 4: Scoring

Score the caption against the Caption & CTA sub-criteria from references/scoring-system.md.

1. Load scoring-system.md and extract the Caption & CTA category (20pts max)
2. Score each sub-criterion individually
3. Calculate the total out of 20 points
4. If score < 16/20, revise the weakest sub-criterion before delivery
5. Present the score breakdown with the caption

Score presentation format:

Caption Score: [X]/20

- [Sub-criterion 1]: [X]/[max] — [1-line justification]
- [Sub-criterion 2]: [X]/[max] — [1-line justification]
- [Sub-criterion 3]: [X]/[max] — [1-line justification]
- [Sub-criterion 4]: [X]/[max] — [1-line justification]

Phase 5: Delivery

Deliver the complete caption ready to paste into Instagram.

Quality Gate Checklist (verify before delivery)

| # | Check | Pass? | |---|-------|-------| | 1 | Hook variation opener differs from visual hook | | | 2 | Value body is 300-400 characters | | | 3 | Total caption is 500+ characters | | | 4 | CTA follows the priority hierarchy | | | 5 | 3-5 niche hashtags (no generic ones) | | | 6 | No em dashes anywhere in the caption | | | 7 | Correct language, address form, and creator voice (per account-baseline.md) | | | 8 | Score is 16+/20 | |

Delivery Format

## Caption fur: [Post Topic]

### Post Type: [Reel / Carousel / Feed / Story Highlight]
### Visual Hook: "[hook text from the post]"

---

[Complete caption — ready to paste]

---

### Score: [X]/20
[Score breakdown per sub-criterion]

### Hashtags included: [N]
### Character count: [N]

Anti-Patterns (Never Do These)

| Anti-Pattern | Why | |-------------|-----| | Copy visual hook as caption opener | Redundancy kills engagement; algorithm sees duplicate text | | Generic hashtags (#fitness, #motivation) | Zero discovery value, signals low-effort content | | Em dashes in caption | Quality Gate G2 violation; #1 signal of AI-generated text | | "Hey ihr Lieben" as Reel/Feed opener | Stories-only greeting; captions need hooks, not greetings | | Stacking 3+ CTAs | Overwhelms the reader; max 2 (primary + secondary) | | Caption under 500 characters | Underperforms on saves; Instagram rewards substantive captions | | Using "Sie" or overly formal tone | Audience is community-driven; "du" is mandatory | | Delivering without score | Quality Gate G1 violation; score is mandatory for every deliverable |

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: nicojunk
• Source: nicojunk/claude-ig
• License: MIT

Install and usage instructions live in the source repository linked above.